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SUMMARY:Relating non-locality and device-independent randomness - Roger Co
 lbeck\, University of York
DTSTART:20230615T131500Z
DTEND:20230615T141500Z
UID:TALK196018@talks.cam.ac.uk
CONTACT:Damian Pitalua-Garcia
DESCRIPTION:To generate device-independent randomness requires non-localit
 y. In typical analyses based on the CHSH Bell inequality\, the amount of c
 ertifiable randomness increases with the Bell violation. However\, this in
 tuitive relationship is not all it seems. I will explain how a maximal two
  bits of certifiable randomness can be obtained using a pair of entangled 
 qubits for a wide range of nonlocality\, including arbitrarily small amoun
 ts\, and that for correlations with too much non-locality the amount of ce
 rtifiable randomness decreases. This is achieved through a tight upper bou
 nd on the randomness as a function of CHSH violation. Our theoretical resu
 lt has implications in practical cases\, allowing more randomness to be ju
 stifiably extracted from real (noisy) data in a range of cases. This is ba
 sed on arXiv:2205.00124 (joint with Lewis Wooltorton and Peter Brown).
LOCATION:MR2
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